540s
540s ke ngwagasome tšhupamabakeng ya Gregorian wa go thoma ka 1 Pherekgong 540 ya fela ka 31 Manthole 549. Ngwagasome 540s o wela ngwagengkgolo wa 6.
| Ngwagakete: | Ngwagakete 1 |
| Mengwagakgolo: | Ngwagakgolo 5 – Ngwagakgolo 6 – Ngwagakgolo 7 |
| Mengwagasome: | 510s 520s 530s – 540s – 550s 560s 570s |
| Mengwaga: | 540 541 542 543 544 545 546 547 548 549 |
| 540s-tšago tswalanya: |